defmodule Pleroma.Web.MediaProxy do
alias Pleroma.Config
+ alias Pleroma.Helpers.UriHelper
alias Pleroma.Upload
alias Pleroma.Web
alias Pleroma.Web.MediaProxy.Invalidation
def url("/" <> _ = url), do: url
def url(url) do
- if disabled?() or not url_proxiable?(url) do
- url
- else
+ if enabled?() and url_proxiable?(url) do
encode_url(url)
+ else
+ url
end
end
@spec url_proxiable?(String.t()) :: boolean()
def url_proxiable?(url) do
- if local?(url) or whitelisted?(url) do
- false
+ not local?(url) and not whitelisted?(url)
+ end
+
+ def preview_url(url, preview_params \\ []) do
+ if preview_enabled?() do
+ encode_preview_url(url, preview_params)
else
- true
+ url(url)
end
end
- defp disabled?, do: !Config.get([:media_proxy, :enabled], false)
+ def enabled?, do: Config.get([:media_proxy, :enabled], false)
+
+ # Note: media proxy must be enabled for media preview proxy in order to load all
+ # non-local non-whitelisted URLs through it and be sure that body size constraint is preserved.
+ def preview_enabled?, do: enabled?() and !!Config.get([:media_preview_proxy, :enabled])
- defp local?(url), do: String.starts_with?(url, Pleroma.Web.base_url())
+ def local?(url), do: String.starts_with?(url, Pleroma.Web.base_url())
- defp whitelisted?(url) do
+ def whitelisted?(url) do
%{host: domain} = URI.parse(url)
mediaproxy_whitelist_domains =
defp maybe_get_domain_from_url(domain), do: domain
- def encode_url(url) do
+ defp base64_sig64(url) do
base64 = Base.url_encode64(url, @base64_opts)
sig64 =
base64
- |> signed_url
+ |> signed_url()
|> Base.url_encode64(@base64_opts)
+ {base64, sig64}
+ end
+
+ def encode_url(url) do
+ {base64, sig64} = base64_sig64(url)
+
build_url(sig64, base64, filename(url))
end
+ def encode_preview_url(url, preview_params \\ []) do
+ {base64, sig64} = base64_sig64(url)
+
+ build_preview_url(sig64, base64, filename(url), preview_params)
+ end
+
def decode_url(sig, url) do
with {:ok, sig} <- Base.url_decode64(sig, @base64_opts),
signature when signature == sig <- signed_url(url) do
if path = URI.parse(url_or_path).path, do: Path.basename(path)
end
- def build_url(sig_base64, url_base64, filename \\ nil) do
+ def base_url do
+ Config.get([:media_proxy, :base_url], Web.base_url())
+ end
+
+ defp proxy_url(path, sig_base64, url_base64, filename) do
[
- Config.get([:media_proxy, :base_url], Web.base_url()),
- "proxy",
+ base_url(),
+ path,
sig_base64,
url_base64,
filename
|> Enum.filter(& &1)
|> Path.join()
end
+
+ def build_url(sig_base64, url_base64, filename \\ nil) do
+ proxy_url("proxy", sig_base64, url_base64, filename)
+ end
+
+ def build_preview_url(sig_base64, url_base64, filename \\ nil, preview_params \\ []) do
+ uri = proxy_url("proxy/preview", sig_base64, url_base64, filename)
+
+ UriHelper.modify_uri_params(uri, preview_params)
+ end
+
+ def verify_request_path_and_url(
+ %Plug.Conn{params: %{"filename" => _}, request_path: request_path},
+ url
+ ) do
+ verify_request_path_and_url(request_path, url)
+ end
+
+ def verify_request_path_and_url(request_path, url) when is_binary(request_path) do
+ filename = filename(url)
+
+ if filename && not basename_matches?(request_path, filename) do
+ {:wrong_filename, filename}
+ else
+ :ok
+ end
+ end
+
+ def verify_request_path_and_url(_, _), do: :ok
+
+ defp basename_matches?(path, filename) do
+ basename = Path.basename(path)
+ basename == filename or URI.decode(basename) == filename or URI.encode(basename) == filename
+ end
end